package com.edu.jsu.gateway.filter;

import com.google.gson.JsonObject;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.util.AntPathMatcher;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.nio.charset.StandardCharsets;
import java.util.List;

/**
 *
 * 全局Filter，统一处理登录与外部不允许访问的服务
 *
 * @author 廖俊杰
 * @version 1.0
 * @date 2021/11/30 13:42
 */
@Component
public class AuthGlobalFilter /*implements GlobalFilter, Ordered */{

//    private AntPathMatcher antPathMatcher = new AntPathMatcher();
//
//    @Override
//    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
//        ServerHttpRequest request = exchange.getRequest();
//        String path = request.getURI().getPath();
//        //api接口，校验用户必须登录
//        if(antPathMatcher.match("/api/**/auth/**", path)) {
//            List<String> tokenList = request.getHeaders().get("token");
//            if(null == tokenList) {
//                ServerHttpResponse response = exchange.getResponse();
//                return out(response);
//            } else {
//
//                ServerHttpResponse response = exchange.getResponse();
//                return out(response);
//            }
//        }
//        //内部服务接口，不允许外部访问
//        if(antPathMatcher.match("/**/inner/**", path)) {
//            ServerHttpResponse response = exchange.getResponse();
//            return out(response);
//        }
//        return chain.filter(exchange);
//    }
//
//    @Override
//    public int getOrder() {
//        return 0;
//    }
//
//    private Mono<Void> out(ServerHttpResponse response) {
//        JsonObject message = new JsonObject();
//        message.addProperty("success", false);
//        message.addProperty("code", 28004);
//        message.addProperty("data", "鉴权失败");
//        byte[] bits = message.toString().getBytes(StandardCharsets.UTF_8);
//        DataBuffer buffer = response.bufferFactory().wrap(bits);
//
//        //指定编码，否则在浏览器中会中文乱码
//        response.getHeaders().add("Content-Type", "application/json;charset=UTF-8");
//        return response.writeWith(Mono.just(buffer));
//    }
}
